Synergy of Life and Legacy

Shared Mastery: Whenever you cast a creature, search your library for a Horse or Insect card, reveal it, and put it into your hand. Shuffle.
Life Partner's Bond: At the beginning of your upkeep, if you control both a Horse and an Insect, choose one:
•Gain life equal to the highest power among creatures you control.
•Target creature gains Toxic {1}
Strength of the Rider: {1}{w}, Sacrifice an Insect: Horses you control gain vigilance and lifelink until end of turn.
Wisdom of the Reaver: {2}{b